Improvement in chucks



" @uitrit GEORGE WJHARnIsf'iiNn Wiliam'au11Y einem. 'or NEW remi, n'. nl

'.Afssienons To WiLLiAM isolieren 0F THESSAME PLAGE." i l Letters Patent No. 66,(i-S1OZvcttd June 25, 1867.A l

tetes. getint-"hten I ilge Sdgsinileirftttrh in in ilgrse was frizioni mnh-making putt utiliz sinne;

yT() VALL WHQM IT MAY CONGERN:

Be it known that we, GEORGE W.'HAnRIs and WILLLiM H. HAIenr,of the city, county, andL State of vNew loryl, have invented a new and useful Im'proveihent in Chucks; and we ,do hereby declare that-the following is nvii'll, clear, and exact description of' the same, reference being had to the accompanying drawings, making anportion-of this specification, in' which- V V y Figure l is au end view of a. chuck', constructed according to our invention.

.Figure 2 is a side vieiv of" theusamle. I

Figure 8 isa central longitudinal section of thesame.

Figur-e4 'is a detached View of a portion of the same` i I Similar letters of reference indicate corresponding parts in all the figures. i

This invention consists infan operating ring, construct-edwit-h an internal screw and a sui'iable sliding-nut; in lcombination with va conical shell and sliding griping-jairs, whereby a strongand simple4 chuck, specially adapted for holding drills, Wirc, or other small articles, is secured. l I

l To` enable others to understand the construction and operation oi' our invention, we will proceed to describe i't'witli reference tothey drawings.

"ny-71111;!ShclLAaqLthefchuclLis.oiifconicalffermvawsherrnfait a; end-is constructed-irithw-centralslot or opening, e, at the rear end of whiclris formed an: internal-sciew,'a,'by means oi' which the chuck' is attached to the spindleor mandrel' of theJlathe. The cylindrical tubular neck 0l, which extends back frein the shell, has

fitted upon it the broadopcrating ring c, which is retained in place thereon by a flanged nut, f, scjeived upon the end of. the` aforesaid heelel The operating ring just mentioned is constructed with a wide and deep annular f `groove, Qin its forwhrd side, which receives the sliding-nut B, screivecl vupon the internal screw y', formed by the between them. i

central portion ofthe aforesaid operating ring e; ,Provided longitudinally in the conical shell A, at equal distances apart, and in positions nearly or quite parallel with the inclined 'outer sides'tliereof,nre three slots orguides, which reeeivethe slidingjaivs or dogsC, the `'inner or Arear ends of which are fitted into radial grooves e", forined in the frontside vof thc nut B, the said grooves beingcoustruetedn'ith ilanches or lips f, which tit into transverse groovesror recesses in one side of suchende of each of the jaws C, in such manner that the said jaws, being thi-isv attached to the nut B, 'are -moved forward or back, `as `the case may be, hy the slidingr more `ment of then-ht, i i Y i i The drill, Wire,.or`other article to be held or clinched, is insertedA between the forward ends of` th(` jaws or 4 dogs C, 'and the operating ringe is ,turned around Iinr such direction as tno cause the internal screw g to more forward-the nntB; and consequently to f'o're forward. the jaws C, which more in their inclined guides, hereinbefore described, in such mannerthat their outer or forward ends aforesaiil are iii-ade to approach each other` and thus 'forcibiy grasp the articleplacd between them. In order t-o remove vthe said article from'the chuck, the operating ring e is turned inl an opposite direction, and, acting through the nut B, draws back the jaws in their incliiied guides, i thus bringing their forward ends away'froin each other 4to release the larticle held qWhat we' claim"s'odilinvention, and desire to secure by Letters' Patent, is i The operating ring e, constructed with the internal screw y, andthe nut B, formed with radial grooves e, in

` combinationwith `theconical shell A and sliding-jaws C, substantially-as `and for the purpose herein described. V

one. W.- HARRIS, i A n: Hausnr.

Witnesses: i

J'.v W. CooMs, GEO. Wl REED. 

